CVE-2026-93921CWE-862broken-access-control

CVE-2026-93921

Medium · published September 19, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
30.7
In the wild
Unconfirmed
What it is

SiYuan versions through 3.8.4 fail to enforce publish access control in the getDynamicIcon endpoint, allowing read-only token holders to access document metadata. Attackers can call the endpoint with type=8 and crafted content to read block titles, names, aliases, and hierarchical paths of restricted documents via template injection.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00378 · 30.7th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-09-19T04:16Z
References (7)
https://github.com/siyuan-note/siyuan · [email protected]https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/icon.go#L546-L549 · [email protected]https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/router.go#L51 · [email protected]https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/template.go#L485-L526 · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838 · [email protected]https://www.vulncheck.com/advisories/siyuan-through-3.8.4-access-control-bypass-via-dynamic-icon-endpoint · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 22 SEP 03:44Z
    EPSS moved — → 0%
    epss
  • 18 SEP 23:12Z
    SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpoint
    cvelistv5